[U-Boot-Users] AMCC440SPe & PCI Express

[kans]

Hello,

I am using u-boot 1.3.0-rc3 for my custom 440SPE board and configured PCIE1
as endpoint.

After configuring the KATMAI board as RC(running Linux), I am able to
establish the link between KATMAI and my board.

I have few doubts here.

1. CFG space (OUTBOUND BAR4) is mentioned as 512MB minimum.  But the CFGMSK
register says it can start from 128 Bytes.  Using lesser values from 512MB
creates Machine Check exception.

2. I have set PIMEN as 0x1.  ie. Enable access for BAR0(I have set
PIM01SAL/H for 1MB).  The Katmai board views BAR0(1MB memory), BAR2 as IO,
and BAR4 as Memory. It doesnt assign any addresses to BAR2 and BAR4.  Also I
have not enabled any IO space in my custom board. 

Please let me know for 
1.  Why there are Machine check exceptions using lesser values in CFG(less
than 512MB)?
2.  Why other BARs are getting enabled?

--
Kans




wd wrote:
> 
> Dear Pankaj,
> 
> in message
> <9B832BEB407A774AA0520CCFC23221970B47D178 at CXOEXC11.AMERICAS.CPQCORP.NET>
> you wrote:
>>
>> I have been using u-boot-1.1.5 on my custom 440SPe based board. I am
>> able to establish a link on PCIE0. However, I am having trouble
>> accessing outbound Memory on PCIE0. My memory map seetings for Outbound
>> PCIE memory are the default U-boot Settings. I was curious if anybody's
>> tried accessing PCIE Outbound memory with the default settings. I seem
>> to get a bus error when I try to access that region.
> 
> I confirm that there is some problem with PCIe on these systems. We're
> working on this right now. Please stay tuned.
> 
> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> Q:  How do you play religious roulette?
> A:  You stand around in a circle  and  blaspheme  and  see  who  gets
>     struck by lightning first.
> 
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share
> your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users
> 
> 

-- 
View this message in context: http://www.nabble.com/AMCC440SPe---PCI-Express-tf2872188.html#a13947577
Sent from the Uboot - Users mailing list archive at Nabble.com.